@mediaxpost/aescrypt-helper

aescrypt-helper

aescrypt-helper is a set of simple tools to deal with the AES-256 encryption and decryption of data with arbitrary lengths.

Installation

npm install @mediaxpost/aescrypt-helper

Usage

const AESCryptHelper = require('@mediaxpost/aescrypt-helper');

const secret = '41e8c08ff31f97547ac11cc47c29f8ce5cb187a70ef09226c0f025c25c55b5b3';
const iv = '3816d1474cf82f3182b83c390d3e8eb5';
const creds = { secret: null, iv: null };

creds.secret = Buffer.from(secret, 'hex');
creds.iv = Buffer.from(iv, 'hex');
const aescyptHelper = new AESCryptHelper(creds.secret, creds.iv);

console.log(aescryptHelper.decrypt(aescryptHelper.encrypt('Test Message')));

API Reference

AESCryptHelper constructor(secret, iv[, separator]) ⟾ instanceof AESCryptHelper

Create an instance of AESCryptHelper using the secret, and iv (initialization vector). Optionally, a block separator can be provided to determine how blocks of data are separated. For many implementations this is a new-line character, this library defaults to '$$$$'. The secret, iv, and the separator can be a string or a Buffer.

Note: The iv should be no more than 16-bytes in length and the secret should be no more than 32-bytes in length. When including a separator, it is recommended that non-base-64 characters are used.

AESCryptHelper.encrypt(data [, secret]) ⟾ Buffer

Encrypt the data Buffer with the configured secret or the optionally passed secret. No iv is used for the encryption. Returns the encrypted data in a Buffer.

AESCryptHelper.encryptiv(data [, secret] [, iv]) ⟾ Buffer

Encrypt the data Buffer with the configured secret or the optionally passed secret and the configured iv or the optionally passed iv. Returns the encrypted data in a Buffer.

AESCryptHelper.decrypt(encryptedData [, secret]) ⟾ Buffer

Decrypts the encryptedData Buffer with the configured secret or the optionally passed secret. No iv is used for the decryption. Returns the decrypted data in a Buffer.

AESCryptHelper.decryptiv(encryptedData [, secret] [, iv]) ⟾ Buffer

Decrypts the encryptedData Buffer with the configured secret or the optionally passed secret and the configured iv or the optionally passed iv. Returns the decrypted data in a Buffer.

License

Copyright (c) 2018,2019 Jay Reardon -- Licensed under the MIT license.